1.2 A, 20 V, 700 kHz/1.4 MHz,

Nonsynchronous Step-Down Regulator

ADP2300/ADP2301

Rev. 0

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FEATURES

1.2 A maximum load current

±2% output accuracy over temperature range

Wide input voltage range: 3.0 V to 20 V

700 kHz (ADP2300) or 1.4 MHz (ADP2301)

switching frequency options

High efficiency up to 91%

Current-mode control architecture

Automatic PFM/PWM mode switching

Precision enable pin with hysteresis

Integrated high-side MOSFET

Integrated bootstrap diode

Internal compensation and soft start

Minimum external components

Undervoltage lockout (UVLO)

Overcurrent protection (OCP) and thermal shutdown (TSD)

ADIsimPower™ online design tool

Available in ultrasmall, 6-lead TSOT package

APPLICATIONS

LDO replacement for digital load applications

Intermediate power rail conversion

Communications and networking

Industrial and instrumentation

Healthcare and medical

Consumer

TYPICAL APPLICATIONS CIRCUIT

3.0V TO 20V

VIN

BST

SW

FB

EN

ON

OFF

GND

ADP2300/

ADP2301

Figure 1.

60

65

70

75

80

85

90

95

100

0

0.2

0.4

0.6

0.8

1.0

1.2

Figure 2. Efficiency vs. Output Current

GENERAL DESCRIPTION

The ADP2300/ADP2301 are compact, constant-frequency,

current-mode, step-down dc-to-dc regulators with integrated

power MOSFET. The ADP2300/ADP2301 devices run from

input voltages of 3.0 V to 20 V, making them suitable for a wide

range of applications. A precise, low voltage internal reference

makes these devices ideal for generating a regulated output

voltage as low as 0.8 V, with ±2% accuracy, for up to 1.2 A load

current.

There are two frequency options: the ADP2300 runs at 700 kHz,

and the ADP2301 runs at 1.4 MHz. These options allow users to

make decisions based on the trade-off between efficiency and

total solution size. Current-mode control provides fast and stable

line and load transient performance. The ADP2300/ADP2301

devices include internal soft start to prevent inrush current at

power-up. Other key safety features include short-circuit protec-

tion, thermal shutdown (TSD), and input undervoltage lockout

(UVLO). The precision enable pin threshold voltage allows the

ADP2300/ADP2301 to be easily sequenced from other input/

output supplies. It can also be used as a programmable UVLO

input by using a resistive divider.

The ADP2300/ADP2301 are available in a 6-lead TSOT package

and are rated for the −40°C to +125°C junction temperature range.